Scarlett Johansson is reportedly romancing Josh Hartnett after falling for him on the sets of her latest movie "The Black Dahlia".

The stunning actress - who is said to have ended her relationship with "Alexander" actor Jared Leto earlier this month - has been on a string of romantic dates with Hartnett during shooting in Bulgaria, reports Femalefirst.

"There was a real spark between Scarlett and Josh from the minute they met. Romance is definitely in the air. They have been on several dinner dates together," a source said.

Johansson, who once moaned that young men didn't chat her up, had recently said her relationship with Jared was doomed - because they rarely got to see each other.